GitLab

- Posts a delayed task to close connection
- Adds a test to check kTimedOut status in TransferMetadata

Bug: 1085068
Change-Id: I7c74b19533a97272d0aede9940eaa3f477e47827
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2359129Reviewed-by: Alex Chau <alexchau@chromium.org>
Commit-Queue: Himanshu Jaju <himanshujaju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799155}